We promise we will provide the best quality and a reasonable price for you! Name: SF-A4040 Medium Duty Spigot trussProduct Description:Size:400*400/3mm thickness,Main tube 50*3mm,Brace is 25*2mm,the normal length for one pc is 1m-4m,it can be stretched to 14m with max load 475kg.It can be stretch to 14m with max load kg SF-A4040 Medium Duty Spigot truss